Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78404aaca91f308…

MALICIOUS

PDF

49.7 KB Created: 2020-08-06 13:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfc95c0544c880052a99411bafc446b4 SHA-1: 337c579957532973f8d67a29f3dfe94f53660b4f SHA-256: d78404aaca91f308a2ba2d59dabdd82d3c22b63d8c8a605afab0115d3c9478e8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. This link is presented within the document body, disguised as a 'Dahua cctv camera price list pdf'. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=dahua+cctv+camera+price+list+pdf
    • http://files.nysfcja.org/uploads/1/3/0/7/130738531/49cec1.pdf
    • http://wijajol.ruthtenzerfeldman.com/uploads/1/3/1/3/131380058/getifasubi_walajuvojuboz.pdf
    • http://files.wholesalesportsplus.com/uploads/1/3/1/3/131384573/dojepujorakugewifa.pdf
    • http://jipidixit.dwarfhollowfarmstead.com/uploads/1/3/1/3/131383791/wonujelonebokun-dizimamud.pdf
    • http://files.nysfcja.org/uploads/1/3/0/7/13073853
    • https://cdn.shopify.com/s/files/1/0430/8572/5857/files/47051073732.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/certified_management_accountant_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0434/7753/2822/files/89307405068.pdf
    • https://cdn.shopify.com/s/files/1/0435/2232/6696/files/pifafirepewetadebi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/xujejiwewomezavixot.pdf
    • https://cdn.shopify.com/s/files/1/0434/7291/2549/files/tilaxozowasa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5743/files/40013627104.pdf
    • https://cdn.shopify.com/s/files/1/0432/1820/6887/files/vibadijezejudajori.pdf
    • https://cdn.shopify.com/s/files/1/0432/8652/8155/files/jukadivi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007773.bin
44f5678e73c7a6693309661a438768a7026f216bdf8866d8c87902af7146d836
pdf-font-stream PDF embedded font (sfnt) at offset 0x7773 5452 bytes
font_01_sfnt_off000089dd.bin
d1e42598c4275744593b1f563857533294e2014615db992b8a301a4c2ed2187c
pdf-font-stream PDF embedded font (sfnt) at offset 0x89DD 15672 bytes